PDF Tools
Merge PDF Files Online
Combine multiple PDF files into one document. Reorder pages and download the merged PDF from your browser.
No uploadReorder filesBrowser tool
Fast PDF merging in the browser
Merge PDF uses pdf-lib to combine multiple PDF documents into a single file. All processing happens locally in your browser, so your documents never leave your device. You can reorder files before merging to control the final page order.
Questions
Can I reorder the PDFs before merging?
Yes. Use the drag handles or move up/down buttons to arrange PDFs in your preferred order before merging.
Is there a file size limit?
The tool runs in your browser, so the limit depends on your device's memory. Most computers can handle several hundred megabytes.
Are my PDFs uploaded to a server?
No. Merging happens entirely in your browser, so files never leave your device.